LEFT HAND ACME THREAD
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Uploader Comments (doubleboost)
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All Comments (11)
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@doubleboost look at the videos by tubalcaine.
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@simiweld Thanks mate i will keep that in mind, i havnt had the chance after all these months but any info is great when i get around to doing it.
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@toranacar The biggest problem with I.D. threading is boring bar deflection. If you keep advancing the cut when you have a lot of deflection it will eventually dig. Use as large of a boring bar as possible and take a second or third cut at the same dimension if the cutter is still producing chips at that dimension due to deflection
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2 slow
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Thank you
Im trying to make an acme thread/lead screw and nut 8 tpi left hand thread.
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how does that cutting tool work?
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Im just an amateur on this stuff, basically I can turn down some rod etc but I cant make threads, when ever I try to cut a thread I cross cut the thread on the second and third pass and basically make a mess. Any tips on what I'm doing wrong?
Thanks
toranacar 2 years ago
The simplest way is to leave the lead screw engaged & reverse the lathe.
Loads of info on the net
doubleboost 2 years ago
@doubleboost
THIS IS TRUE ONLY IF YOU HAVE A GEARED HEAD LATHE. IF IT IS BELT DRIVEN, THERE IS TOO MUCH PLAY AND THREAD LEAD WILL NOT PICK UP EXACTLY AND YOU WILL CROSS THREAD WHEN YOU CHANBE DIRECTIONS.
alpho52 1 year ago
@alpho52
You still have to back the tool off or it will spoil the thread you never have a belt drive between the spindle and lead screw lol
doubleboost 1 year ago